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(No Model.)

JQSTOTT.

GAS REGULATOR.

No. 354,844. Patented Dec. 21, 1886.

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I UNITE STATES PATENT OFFICE;

JAMESSTOTT, OF LONDON, ENGLAND.

GAS-REULATOR.

SPECIFICATION forming part of Letters Patent No. 354,844, dated December 21, 1886. Application filed August 19, 1886. Serial No. 211,314. (No model.) Patented in England May 28, 1886, Nb. 7,197.

To all whom it may concern:

Be it known that I, JAMES STOTI, a subject of the Queen of Great Britain, residing at 174 Fleet Street, in the city of London, England, have inventeda new and useful Gas-Regulator, (for which I have obtained a patent in Great Britain No. 7,197, bearing date May 28, 1886,) of which the following is a specification.

This invention has for its object to provide a novel gas-regulator for regulating or controlling the flow of gas to the burners of streetlamps, whereby any determined number of feet of gas per hour can be supplied to the burnertips notwithstanding'variations or the amount of pressure in the gas-mains, provided the initial pressure is always above that for which the regulator is adjusted.

The object of my invention I accomplish by the construction and combination of devices hereinafter described and claimed, reference being made to the accompanying drawings, in which- Figure l is a sectional elevation of a gasregulator embodying my invention; Fig. 2, a detail plan view of the dome-shaped float and regulating-valve disk, and Fig.3 a sectional, elevation showing the position of the parts when the gas is burning at the burner-tip.

In order to enable those skilled in the art to make and use my invention, I will now describe the same in detail, referringto the drawings, where The letter A indicates a hollow casing, hav-- ing its bottom wall centrally raised to provide an annular basin, 0, for containing mercury or other sealing liquid, said raised part of the easing constituting an arched shield, O, to prevent the mercury from spilling if the casing be tilted. The shield O is provided with a de pending tube, 0 which is screwed upon the gas-inlet pipe B, and in the said tube are seated two perforated diaphragms or bridge-pieces, L, through which passes a vertically-movable stem, H, carrying a dome-shaped float, D, the lower edge of which dips in the mercury in the basin 0, so that a seal is formed at this point.- The stem projects upward through the float and carries a cone-valve, I, at its upper extremity, adapted to seat in the lower open end of a depending tube, J, formed'with a detachable cover, K, having a screw-threaded connection with the casing. This cover carries the burner-tip M, which communicates with the depending tube J.

provided with a series of orifices, 11], two or more, controlled by a valve-disk, F, havinga corresponding number of orifices, G. This valve-disk is concaved on its under side to conform to and rest upon the top surface of the float, and it is provided withacentral opening, through which the valve-stem H loosely passes in such manner that the valve-disk is centrally journaled on the valve-stem between the top surface of the float and the base of the cone valve I. The valve-disk is capable of being rotated on the valve-stem to bring its orifices G into and out of coincidence with the orifices in the float. By turning the valve disk the orifices E in the float can be more or less closed to determine the quantity of gas that shall pass to the burner-tip.

In the event of the quality of gas being reduped-say from thirty to twenty candlepowerit becomes necessary to pass a larger number of feet of gas to the burner-tip in order to provide the desired illuminating power. This is readily effected by rotating the valvedisk to enlarge the gas passage-ways formed by the orifices E and G. The cone-valve entering thelower end of the depending tubeon the the gas-pressure in the casing and in the inletpipe equilibriates' the floats. The valve-stem H, being guided in its vertical motion by the diaphragms or bridge-pieces L, produces alevel dip of the float in the mercury or other liquid, and the latter provides a sealed joint, so that the gas can only enter the casing and pass to the burner-tip through the orifices in the float and valve-disk.

I am aware of the gas-regulators disclosed by German Patent N 0. 19,794 and by United States Patents Nos. 157,280 and 213,335, and I do not wish to be understood as broadly claiming such regulators.

Having thus described my invention,what I claim is- 4 1. A gas-regulator consisting of the casing A, having a basin, 0, for containing mercury or other sealing liquid, and provided with a depending tube for connecting with a gas-inlet pipe, the bridge-pieces L in the said depending tube, the valve-stem H, having a valve, 1,.

The top part of the dome-shaped float D iscover more or less closes this tube,'and' thus and guided by the bridge-pieces,a dome-shaped float, D, mounted on the valve-stem and dipping in the liquid seal, and provided with a series of orifices, E, a valve-disk, F, centrally 5 journaled and rotatable on the valve-stem, and

having orifices G, and a cover, K, having a tube, J, on which the valve of the valve-stem is adapted to seat, substantially as-described.

2. A gas-regulator consisting of a casing, A, having a centrally-raised shield, O, forming a basin, 0, for mercury or sealingliquid and provided with a depending tube, 0 containing the upper andlower bridge-pieces L,'the valvestem H, having a valve, I, and guided by the bridge-pieces, a do me-shaped float, D, mounted on the valve-stem, dipping in the liquid seal, and provided with a series of orifices, E, a valve-disk, F, in contact with the float, centrally journaled and rotatable on the valvestem, and having orifices G, and a cover, K,

having a tube, J, on which the valve of the valve-stem is adapted to seat, substantially as described.

3. The combination, with the vessel A, having the liquid-basin O, the dome-shaped float D, having a series of orifices, E, the cover K, and the valve-stem H, extending through the top of the float and provided at its upper end with a valve, I, of the concavedvalve-disk F in contact with the float, having a series of orifices, G, and centrally journaled and rotatable on the valve-stem between the base of the valve and the top surface of the float, substantially as described.

' JAMES STOTT. Witnesses:

HENRY GARDNER,

166 Fleet St, London, Patent Agent. TOBIAS GA NsFoRD RIDGEWAY,

19 Change Alley, London. 

